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lousy at math

Command: (load "phi") ; error: LOAD failed: "phi"

Command: phi

1.61803

Command: Command: '_.help Command: (* phi 2) ; error: bad argument type: numberp: nil

Command: (* (phi) 2) ; error: no function definition: PHI

Command: phi

1.61803

Command: Command: PHI 1.61803

Command:

my acaddoc.lsp has this in it..... (defun c:phi () (/ (+ 1 (sqrt 5)) 2))

am scratching head as to why i cant times it by two.. or three, or .... which part of code did i write wrong? did it on fly. seems to me, that i should simply be able to :: (* phi 2) (times phi by two)

oh well.

Reply to
sunnysidedown
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I think the problem is that you haven't set a variable to hold the real number. The function returns the value, but only when you run it, and I don't think you can run it when it's a term in another function. Try running this:

(defun c:phunction ( / ) (setq phi (/ (+ 1 (sqrt 5)) 2)))

Now you can summon the vaule stored in phi from other functions during the drawing session. I also think it's a problem to have the function and the variable have the same name. If you want to use the value of phi in other functions, name this function something else.

Reply to
Michael Bulatovich

(defun c:phi () (setq phi (/ (+ 1 (sqrt 5)) 2))) The function name won't interfere with the variable name, so if sunnysidedown wants to have a "phi" function and variable, it'll be OK.

Reply to
Bill DeShawn

That's what I thought, but it didn't work until I changed it...That's why I said "I think".

Reply to
Michael Bulatovich

Not being critical, just factual. You would be correct in assuming there would be interference IF the function name did not have "c:" in front of it.

Bill DeShawn

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That's what I thought, but it didn't work until I changed it...That's why = I

Reply to
Bill DeShawn

Have you tried it named the same?\

Bill DeShawn

formatting link
That's what I thought, but it didn't work until I changed it...That's why > I

Reply to
Michael Bulatovich

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